JPS5485778A - Stopwatch - Google Patents
StopwatchInfo
- Publication number
- JPS5485778A JPS5485778A JP15394977A JP15394977A JPS5485778A JP S5485778 A JPS5485778 A JP S5485778A JP 15394977 A JP15394977 A JP 15394977A JP 15394977 A JP15394977 A JP 15394977A JP S5485778 A JPS5485778 A JP S5485778A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- time
- switch
- lap
- counted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Electric Clocks (AREA)
- Measurement Of Unknown Time Intervals (AREA)
Abstract
PURPOSE: To improve the reliability of switch and completely eliminating measuring error, by constructing one or more pieces of external switches to control the switch circuit in electronic type touch switches.
CONSTITUTION: A reference signal from a crystal oscillating circuit 31 is divided down by a frequncy dividing circuit 32, and is counted by a counting circuit 33. When a lead terminal 39 and touch switch 40 is short-circuited with skin resistance of several 100 KΩ, since a pull-down resistance 41 is larger than the skin resistance, the output of an inverter 42 is inverted in short-time response, thereby operating a switch circuit 38. Due to a lap insttuction from the circuit 38, a latch circuit 34 holds the content in the circuit 33. A changeover circuit 35 changes over lap time held in the circuit 34 and the time being counted in the circuit 33 depending on the information from the circuit 38, and outputs. A decoder circuit 36 decodes the lap time from the circuit 35 or the time being measured, and transmits the data to a driver circuit 37. Hence, the reliability of the stopwatch itself may be enhanced, and also precise measurements may be achieved.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15394977A JPS5485778A (en) | 1977-12-20 | 1977-12-20 | Stopwatch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15394977A JPS5485778A (en) | 1977-12-20 | 1977-12-20 | Stopwatch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5485778A true JPS5485778A (en) | 1979-07-07 |
Family
ID=15573587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15394977A Pending JPS5485778A (en) | 1977-12-20 | 1977-12-20 | Stopwatch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5485778A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015068773A (en) * | 2013-09-30 | 2015-04-13 | セイコーインスツル株式会社 | Electronic equipment, pitch setting method, and pitch setting program |
-
1977
- 1977-12-20 JP JP15394977A patent/JPS5485778A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015068773A (en) * | 2013-09-30 | 2015-04-13 | セイコーインスツル株式会社 | Electronic equipment, pitch setting method, and pitch setting program |
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